Motor table



06h 6i, 1936. p. R PROSSER 2,056,329

MOTOR TABLE Original Filed July 24, 1935 2 Sheets-Sheet l SiN .HSI Y I il EJ@ i 5: ciillllllww".

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MOTOR TABLE Original Filed July-24, 1955 2 Sheets-Sheet 2 A TTORNEYPatented Uct. 6, 1936 UNITED STATES PATENT OFFICE MOTGR TABLE Percy R.Prosser, Pasadena, Calif.

Application July 24, 1933, Serial No. 682,035 Renewed June 8, 1936 1Claim. (Cl. 29-86.3)

generally and more particularly pointed out in This invention relatesbroadly to means adapted to facilitate the removal of the valves of aninternal combustion engine,

The present practice of removing the springs of the valves from thedetachable heads of gas engines of the overhead valve type, by the useof the conventional hand tools, for the purpose of grinding the valvesof such engines, requires considerable labor, patience, and time.

The general object of my invention is to provide a device by means ofwhich the valve springs may be conveniently and quickly removed, withlittle labor, from the detachable heads of overhead valve gas engines,and by means of whichA the heads may be readily supported in aconvenient position for grinding the valves.

Another object is to provide an apparatus of the character stated whichis simple in construction, inexpensive, and highly practical and eicientin operation.

Another object is to provide a device adapted to hold a cylinder headand valves, together with suitable tools, and which device is readilymovable from place to place as may be required, to the end that thecylinder head and valves may be worked upon.

Another object is the provision of an apparatus constituting a table soconstructed and arranged as to permit a cylinder head to assume twopositions thereupon and to be maintained in the position selected.

I do not wish to restrict my invention in its broad aspect to a tablebut in practicing the invention, I provide what may be termed a bench ortable mounted upon castors or small wheels, to the end that a mechaniccan readily move the bench or table adjacent an automobile from which acylinder head is to be removed for placement thereon. The presentembodiment of the invention, as hereinafter set forth, contemplates theplacement of the cylinder head upon the top of the bench or table insuch a manner that the cylinder head may assume two positions, one forthe removal of the valve springs, and a second position to be assumedwhen it is desired to remove the valves from the cylinder head for thepurpose of grinding the valves, and/or seating the valves to the saidhead.

With the above mentioned and other objects in View, the inventionconsists in the novel and useful provision, formation, construction,association and relative arrangement of parts, members, and features,all as shown in a certain embodiment in the accompanying drawings,described the claim.

Other objects and advantages of the invention will appear hereinafter.

In the drawings:

Figure l is a plan view of my invention, with the detachable cylinderhead of an overhead valve gas engine supported thereon, in position forremoval of the valve spring of one of the valves of the engine,

Figure 2 is a front elevation of my invention as illustrated in Figurel,

Figure 2,

Figure 5 is a fragmentary plan view of my invention with a section ofthe table let down so that the cylinder head may be convenientlysupported at the front of the table for grinding the valves of theengine,

Figure 6 is a fragmentary transverse vertical section of the table of myapparatus taken on line 6-6 of Figure 5,

Figure 7 is a perspective of the cylinder head and valve supportingplate,

Figure 8 is a fragmentary vertical section of the valve spring depresserplunger taken on line 8-8 of Figure 4, and,

Figure 9 is a longitudinal section of the upper end of one of the valvestems and the valve retainer lock.

Referring with particularity to the drawings, I designates a tablecomprising a top 2, top supporting frame 3, legs 4, and a bracing frame5 'secured to the legs near the lower ends thereof.

Upstanding rails 6 and 1 may be secured to the rear and end edgesrespectively of the top 2, to prevent objects, such as valve parts, fromdropping off said edges of the top.

A pair of standards 8 are secured to the top 2 of the table, by bolts 9,near the rear of the top, which standards are formed with bearings I0,in their upper ends, in which are journaled cylindrical ends II of asquare rock-shaft I2 extending longitudinally of the table or parallelto the front and rear edges of the table top 2. On said shaft I2, alever I3 is secured adjacent one of the standards 8 by means of a pin I4and clamp I5, formed in the lever and including a clamp bolt I6. To therear end of said lever I3 is connected the upper end of a spring I 1,the lower end of Which spring is connected tol a hook The forward end`vention are as follows:

of the lever i3 is connected to the upper end of a rod 'which extendsdownwardly through the table top il and is connected at its lower end toan arm secured on a horizontal shaft 2| journaled in bearings 22 mountedon the under side of the table bracing frame 5. A foot treadle 23 issecure-d to the shaft 2i and extends forwardly to a point in front cfthe table l to be depressed by the foot of the operator of my apparatus,as will be hereinafter more fully set forth.

On the square shaft l2 is slidably mounted a depressor arm 2tlfordepressing a depressor. plunger 25, said arm being formed with asquareY4V`v` collar which is siidably fitted on said shaftiiso that saidarm may be moved along said shaft from one position to another for thepurpose hereinafter set forth.

2&3 secured at its lower ends to said head, and shank 2Q secured at itslower end to the v'upper end of said stirrup,-said shank being formedwith a slot til extending longitudinally therein to receive the forwardvend ofthe depressor arm 24 which is connected to said shank by a pin 3lextended through said end of said arm and through any pair of alignedholes 32 in said shank at opposite sides of the slot Sii therein, which,pairs of aligned holes are spaced vertically in said shanlr. Byinserting the pin 3l through diiferent pairs of holes 32 in the shank29, the arm 24 may be oennected at different positions to1 the shank 2Sfor adjusting the position of the -depresser head 2l to engage the valvespringV retaining washers at different elevations in different cylinderheads.

The table top 2 is formed with' aihingedl leaf extending inwardly fromthe forward edge of the top in front of the shaft l2, which leaf ishinged at its forward edge, by double-pivot hinges 3d, to the frontangle iron member 35 of the frame E3 cf thetable. top 2, whereby saidleaf S3 may swing into or out of the opening 3.'L,in the table top 2 onthe hinge pivots 38 andidownwardly in front of thetable (Figure 6) oriupwardly therefrom on the hinge pivots 39 to be swung into said opening3l as aforesaid; Y .On cross members of the table top frame 3, at' theends 'respectively of the leaf opening 3l, are formed sockets 4i anddnear the inner. edge of said opening, in either of which sockets may beplaced therends of a rail 53, which, together with the front member 35of said tcp frame, is adapted to support a cylinder head in said leafopening for grinding the Valves .in said head,.when the leaf is swungout of said opening, and down in front of the table. L

For supporting the valves in lthe cylinder head while the head is'positioned on the table for depressing the valve springs to remove thespring retainer locks, I provide a supporting plate 44 formed with aplurality of upstandingvalve supporting bases 45. f Y

The head is provided with an annular recessed portion 2M. This recessedportion; is adapte-d to receive and connerthe washer 52 and hence holdthe washer in position against lateral displacement when the head 21 isbeing depressed to in turn depress the washer and its associated spring53. The diameter of therecess is slightly greater than the greatestdiameter of thewasher 52. ,1

The operation, uses and advantages of my in- To remove the retainerlocks of the valve springs, in a detachable head .of an overhead l valveengine by means of my apparatus in order to remove the valve springs,and to support said head, by means of my apparatus, for grinding saidvalves, the valve supporting plate 4d is first placed on the table top 2in front of the rcck shaft l2 and under the depressor head 2l (seeFigures 2 and 4), the head 5i) is removed from the cylinder block of theengine and placed upon said plate 44'with the valves resting upon thebases 45, an intake valve and an exhaust valve resting upon each of saidbases (Figures i and 2),.; the arm 24 is moved along the rock shaft l2-until the depressor head 2l is directly over` the f upper'end of avalve rod 5I, valve spring retain* ing washer v52 and spring 53 (seeFigure 4); the

`"operator then places his foot upon the treadle The depressorA plunger255.1'- cornprises an annular depressor head 2l; stirrup; i

23 and;depresses, the same, whereupon the shaft |2l.-.is; rockedcounter-clockwise (Figure 3),

. through the medium of said treadle, shaft 2l,

'arm 20,"rod I9, and lever I3, against the tension 1 of .spring l1, 'andthe plunger 25, through the arm. 24, isv depressediuntil the depressorhead 2l, passing over the upperend of the valve stern 5l, engagesthef-valve spring retainingy washer 52 and depresses said washer and thevalve spring 53 until the retaining washer split lock 54 is withdrawnfrom thelock socket 55 in said washer. The lock 54 is then removed bytheoperator from the annular groove 56-in thevalve stem 5i, and theoperator then releases his foot from the treadle 23, whereupon thetreadle, through the medium of lever, |3, rod |9, armiiland rock shaft2l, is raisedback to its normal position and the plunger 25; ,througharm 24, is likewise raised, by the spring H, untilrthe depressor head2?is withdrawn from the valve spring retaining washer 2T andthe upper endof the valve stem 5|. .The Yoperator then removes the retaining washerand the valve spring 53 from the valve stem 5l.

The operator Vvthen moves the arm 24along the rock shaft I2progressivelyutoreach of the remaining valves, andthe above-describedoperations A are repeated Vto remove the retaining lock 54 `of eachremaining valve spring washer 52, so that all of said Washers and valvesprings may be removed bythe operator. When, the retaining locks 54,washers 52 and springs 53 are removed from all of the valves, the`operator swings the leaf: 23, upwardly out o f the opening 31 in thetable top and downwardly on the hinges 34 in front of the table and theoperator then inverts thei cylinder headV 50, with the plate 44 engagingthe bottom of; the head 50 and the Vbases 45H engaging thevalves andplaces the engine head in said opening *'31 upon the front member A35ofthe Vtop frame 3 and the supporting rail .43 in position for grindingthe valves inaisaid head., The valves arethen removed and faced, thevalve seat reamed, then` the valves areground in the usual manner.

After the valves are groundthe cylinder head is then inverted right-sideup and placed upon the tabletop, resting upon the supporting plate -44;the springs and'retaihing washers are placed i over the valve stems; theretaining washers and The cylinder head is conveniently and easilyhandled and the valve spring retaining elements and springs of theengine are easily removed and replaced by the use of my improvedapparatus, and considerable labor, patience and time are thus saved.

The top 2 is of suicient size to allow the Valve springs and otherelements to be definitely positioned thereupon or in trays made for thatpurpose, to the end that the valves and springs, together with theretaining elements, may be again positioned in the cylinder head and inthey same sequence in which they were removed. This is important forproper operation of the engine, as is self-evident.

It is obvious that various changes and modilcations and variations maybe made in practicing the invention in departure from the particularshowing of the drawings without departing from the true spirit of theinvention.

I claim:

An apparatus as disclosed comprising a table, means for supporting acylinder head with valves on the rear portion of said table, means onsaid table for removing the retainer looks, retainer washers and valvesprings from the valves and the cylinder head, while said head issupported on the rear portion of said table, said table being formedwith an opening in the forward portion thereof immediately forwardly ofthe position in which said cylinder head is supported on the table forremoval of the retainer locks, washers, and valve springs, a leaf hingedto the forward edge of the table normally resting within and closingsaid opening, but adapted to swing out of said opening and down in frontof the table so that the cylinder head may be received inverted in saidopening, and means for supporting the inverted cylinder head in saidopening for grinding the valves.

PERCY R. PROSSER.

